Gaussian Beams in Near-Zero Transition Metamaterials

TL;DR

This paper investigates how Gaussian beams experience resonant field enhancement in transition metamaterials with different index profiles, revealing potential applications in nano-optics and sub-wavelength imaging.

Contribution

It provides the first theoretical and numerical analysis of resonant field enhancement of Gaussian beams in transition metamaterials with positive-zero-negative and positive-zero-positive index profiles.

Findings

Strong localized resonant field enhancement observed

Potential applications in nano-optics and nano-fabrication

Foundation for studying complex beam propagation in metamaterials

Abstract

We theoretically and numerically investigate the phenomenon of resonant field enhancement of Gaussian beams in two types of transition metamaterials: with a positive-zero-negative index profile and with a positive-zero-positive index profile and demonstrate strongly localized resonant field enhancement in both cases. This study is likely to have applications in the fields of nano-optics, sub-wavelength imaging, and nano-fabrication and lays a foundation for the studies of more complex vector and vortex beam propagation in graded-index metamaterials.